Initial support for https

@emilio, I have added some support for https on the server

There is also a branch with https server in the frontend, it's mainly for development. Now grunt server the page with https. (it's great not to have to give camera permission anymore) https://github.com/peepoltv/peepoltv-web/tree/https

Please take a look at this commit, probably there are more things to do. I don't think it worth to enable https on development environment. Unless we need to....